Fixed Bug967270 - Removed Categories from Air Mozilla

Deleted all models.py references to categories as well as in views, controllers, and html files.
This includes South migration.
notes about installing dev.txt
Merge pull request #75 from onceuponatimeforever/967270

Fixed Bug967270 - Removed Categories from Air Mozilla
no more complaining about migrations code
fixes 994245 - Need to kill non-functional tweet requests
fixes bug 994365 - always show an Archive button
fixes bug 994364 - Sort options on Event Manager
bug 994145 - debug contributor status on edit user page
fixes bug 994366 - S3 upload on Event Edit
editing a template as default popcorn template
tests for curated_groups_autocomplete
run auto_archive every 2 minutes instead of 5
fixes bug 995359 - approve non-upcoming to pending and redirect to event manager
reduce bottom padding on nested comments slightly
fixes bug 996279 - Always put an increment on slugs on requested events
a more sane default memcached location
fixes bug 996136 - Clicking "Reply" on comment should set focus in textarea
fixes bug 997940 - Access to upload to S3 from event edit requires the wrong uploads permission
fixes bug 997923 - Insufficient Permissions should not redirect to the Login Page
fixes bug 981670 - disable all mail_admins on errors